Table 3.

Descriptive statistics of surface roughness for Ra _CU and Ra _C.

Position	Normally distributed?	—Uncorrected—						—Corrected—
		Mean (µm)	Median (µm)	SD (µm)	Mean (µm)	Median (µm)	SD (µm)	Mean (µm)	Median (µm)	SD (µm)
		Ra CU	Ra CU	Ra CU	Ra L	Ra L	Ra L	Ra C	Ra C	Ra C
Proximal	Yes	2.07	1.74	0.92	0.97	0.89	0.31	1.27	1.07	0.56
Middle	Yes	1.53	1.44	0.50	0.85	0.83	0.18	0.94	0.88	0.30
Distal	No	1.48	1.24	0.77	0.83	0.73	0.33	0.90	0.76	0.47